I am new to overclocking. I have a AMD Barton 2500+ on a board with no multiplier, vdimm, or vcore options, just fsb, an agressive/optimal cpu option and memory timings and speed. It supports 200fsb but I can't get the 2500 to that speed (on the stock 5.5 multiplier) with stability. So I was wanting to increase the vcore to 1.675 as opposed to the 1.65 it's at now.

I'm confused on what I need to do on top of the processor? What bridges should I cut or fill?

Should I just wire it to lower the multiplier? I'm really just after the 200fsb so I can take advantage of the DDR400 in there.

you dont need to work with the Lasercuts, you simply can do the Pin-Mod its way easier und you can undo it if you have to, just cut some Wires from a cable, form them as an "U" and stuck them into the holes.

without cutting L11 bridges you are only able to add voltage to the step of open bridges, what means: L11 says 1,50V, you can wire mod 1,55 1,60 1,65 1,70 1,75 1,80 and 1,85V L11 says 1,60V, you can wire mod 1,65 1,80 and 1,85V L11 says 1,65V, you can wire mod only 1,85V you only have to set a few wires for changing voltage, look what wires must be set for stock voltage, imagine theese are already set, you only have to add the wire(s) for the voltage you need you can use 1,85V but be sure you have a damn good cooler, TMax should be maximum 55°C to be safe